Chess boxing

Chess boxing is a hybrid sport which combines the sport of boxing with games of chess in alternating rounds. Chess boxing fights have been organized since early 2003. The sport was started when Dutch artist Iepe Rubingh, inspired by fictional descriptions of the sport in the writing of Enki Bilal, organized actual matches. The sport has become increasingly popular since then. To succeed players must be both skilled chess players and skilled boxers.
A match between two opponents consists of up to eleven alternating rounds of boxing and chess sessions, starting with a four-minute chess round followed by three minutes of boxing and so on.Between rounds there is a one minute pause, during which competitors change their gear. The form of chess played is speed chess in which each competitor has a total of twelve minutes for the whole game. Competitors may win by knockout, checkmate, a judge's decision or if their opponent's twelve minutes of chess time elapses.If a contestant does not make a move in the chessround, he will be issued a warning by the referee and he must then make a move within the next 10 seconds. Warnings may eventually result in disqualification.